Migrate to dart3

.github/workflows/dart.yml

@@ -10,19 +10,19 @@ jobs:
   format-and-analyze-and-test:
     runs-on: ubuntu-latest
     container:
-      image: google/dart:latest
+      image: dart:3.5.4
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: install dependencies
-        run: pub get
+        run: dart pub get
 
       - name: dartfmt
         run: dart format . --output=none --set-exit-if-changed
 
       - name: analyzer
-        run: dartanalyzer --fatal-warnings --fatal-infos .
+        run: dart analyze --fatal-warnings --fatal-infos .
 
       - name: test
-        run: pub run test ./
+        run: dart test ./

.tool-versions

@@ -0,0 +1 @@
+dart 3.5.4

analysis_options.yaml

@@ -1,19 +1,16 @@
 # For lint rules and documentation, see http://dart-lang.github.io/linter/lints.
 
 analyzer:
-  strong-mode:
-    implicit-casts: false
-    implicit-dynamic: false
-  # exclude:
-  #   - path/to/excluded/files/**
+  language:
+    strict-casts: true
+    strict-raw-types: true
 
 # https://dart-lang.github.io/linter/lints/options/options.html
 linter:
   rules:
     - always_declare_return_types
     - always_put_control_body_on_new_line
     - always_put_required_named_parameters_first
-    - always_require_non_null_named_parameters
     - annotate_overrides
     - avoid_annotating_with_dynamic
     - avoid_bool_literals_in_conditional_expressions
@@ -38,8 +35,6 @@ linter:
     - avoid_relative_lib_imports
     - avoid_renaming_method_parameters
     - avoid_return_types_on_setters
-    - avoid_returning_null
-    - avoid_returning_null_for_future
     - avoid_returning_null_for_void
     - avoid_returning_this
     - avoid_setters_without_getters
@@ -75,14 +70,12 @@ linter:
     - file_names
     - hash_and_equals
     - implementation_imports
-    - invariant_booleans
-    - iterable_contains_unrelated_type
+    - collection_methods_unrelated_type
     - join_return_with_assignment
     - leading_newlines_in_multiline_strings
     - library_names
     - library_prefixes
     - lines_longer_than_80_chars
-    - list_remove_unrelated_type
     - literal_only_boolean_expressions
     - missing_whitespace_between_adjacent_strings
     - no_adjacent_strings_in_list
@@ -111,7 +104,6 @@ linter:
     - prefer_const_literals_to_create_immutables
     - prefer_constructors_over_static_methods
     - prefer_contains
-    - prefer_equal_for_default_values
     - prefer_expression_function_bodies
     - prefer_final_fields
     - prefer_final_in_for_each

lib/monkey/evaluator.dart

@@ -185,7 +185,7 @@ object.Object _evalIntegerInfixExpr(
   } else if (ope == ast.Operator.gt) {
     return (left.value > right.value).toBooleanObject();
   } else if (ope == ast.Operator.equal) {
-    return (left.monkeyEqual(right)).toBooleanObject();
+    return left.monkeyEqual(right).toBooleanObject();
   } else if (ope == ast.Operator.notEqual) {
     return (!left.monkeyEqual(right)).toBooleanObject();
   } else {
@@ -439,7 +439,7 @@ Environment _extendMacroEnv(object.Macro macro, List<object.Quote> args) {
 }
 
 List<object.Quote> _quoteArgs(ast.Call call) =>
-    call.args.map((arg) => object.Quote(arg)).toList();
+    call.args.map(object.Quote.new).toList();
 
 void defineMacros(ast.Program program, Environment env) {
   program.statements

lib/monkey/evaluator/builtin.dart

@@ -115,6 +115,8 @@ extension BuiltinFunction on object.Builtin {
         return _builtinPush;
       case 'puts':
         return _builtinPuts;
+      default:
+        return null;
     }
   }
 }

lib/monkey/evaluator/object.dart

@@ -114,10 +114,8 @@ class Hash extends Object {
         return false;
       }
 
-      if (pair.value is MonkeyEq && otherValue is MonkeyEq) {
-        if (!pair.value.monkeyEqual(otherValue)) {
-          return false;
-        }
+      if (!pair.value.monkeyEqual(otherValue)) {
+        return false;
       }
     }